38 results about "Fixed prosthesis" patented technology

Implantable preparation comprising a material which can be obtained from globin that has been modified, especially chemically, to be, at least partially, soluble at physiological pH, the material being biocompatible, and biodegradable in the organism. The material may be soluble at physiological pH, or insoluble at that pH. The preparation may be in the form of a solution, suspension, paste, gel, film, sponge, powder or granules, or a solid implant. Application in particular to the healing, protection or filling of external skin wounds, the filling of wrinkles and skin flaws, the filling of tissue, as means for fixing prostheses or biomaterials, or means for preventing adhesion.

A femoral neck fixation prosthesis and method of using same which reduces bone loss and the avoids the other shortcomings of the prior art by allowing the fixation of a stable femoral head replacement while reducing the amount of the femur which must be reamed for the insertion of the prosthesis. The preferred embodiment provides that the femoral head is attached to a fixation prosthesis, which extends coaxially through the canal of the femoral neck, into the femur, and is then attached to the opposite lateral wall of the femur. In this manner, the prosthesis serves to imitate the original structure of the femoral neck. No other support members, either crosspins or arms extending into the length of the femur, are required.

A femoral neck fixation prosthesis and method of using same which reduces bone loss and the avoids the other shortcomings of the prior art by allowing the fixation of a stable femoral head replacement while reducing the amount of the femur which must be reamed for the insertion of the prosthesis. The preferred embodiment provides that the femoral head is attached to a fixation prosthesis, which extends coaxially through the canal of the femoral neck, into the femur, and is then attached to the opposite lateral wall of the femur. In this manner, the prosthesis serves to imitate the original structure of the femoral neck. No other support members, either crosspins or arms extending into the length of the femur, are required.

The invention discloses a titanium alloy hemipelvic prosthesis capable of individually retaining part of the acetabulum through 3D printing. The titanium alloy hemipelvic prosthesis comprises a prosthesis contact surface matched with the sacrum, a prosthesis contact surface matched with the rest acetabulum and a cylindrical structure for connecting the two prosthesis contact surfaces, wherein a porous structure is designed on the contact surface attached to the bone tissue, a covered edge is arranged outside the porous structure, two screw holes are formed in the middle of the porous structure, and the prosthesis and the adjacent bone tissue can be fixed by screws, so that early stability is obtained and long-term stability is achieved. The prosthesis contact surfaces are designed according to imaging data collected in the early stage and can be perfectly matched with the sacrum and the rest acetabulum of a patient, and the cylindrical structure is optimally designed through finite element mechanical analysis and a topological structure. The titanium alloy hemipelvic prosthesis is designed according to the remodeling requirement of the residual acetabulum of the underage patient after acetabulum tumor resection, and a relatively good hip joint function can be obtained by restoring the acetabulum structure after remodeling.

The invention discloses a 3D printing semi-pelvic prosthesis. The 3D printing semi-pelvic prosthesis comprises a prosthesis contact surface matched with the sacrum, a prosthesis contact surface matched with the contralateral pubis, a semi-circular acetabular cup structure and a cylindrical structure connecting the prosthesis contact surfaces and the semi-circular acetabular cup structure. The prosthesis contact surfaces at two ends are designed with porous structures, edge wrapping structures outside and two screw holes in the middle, and the cylindrical structures are designed by finite element mechanical analysis and topological structure optimization. The prosthesis contact surfaces at two ends, designed through early collected imaging data, can perfectly fit the sacrum and the contralateral pubis of a patient, respectively; the prosthesis and the contacted bone can be fixed through screws, the position of the center of the semi-circular acetabular cup structure after reconstructionis consistent with that of the original acetabulum center, so that better hip joint function and early stability can be achieved, and the porous structures of the prosthesis contact surfaces are beneficial to later bone ingrowth, so as to achieve long-term stability.

The invention relates to a preparation method of 3Y-TZP ceramic paste and a preparation process of an upper structure of an implant prosthesis, wherein the preparation method of the 3Y-TZP ceramic paste comprises the steps: adding 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a flatting agent into a photosensitive resin premixed solution, fully ball-milling to form ceramic slurry, then adding a photoinitiator, ball-milling again, then adding a rheological additive, and mixing to form the 3Y-TZP ceramic paste. The preparation process of the upper structure of the implant prosthesis comprises the steps of acquiring dentition data of a patient, designing, printing the upper structure of the implant prosthesis, degreasing, sintering, applying facing porcelain and carrying out heat treatment. The 3Y-TZP ceramic paste can be used for 3D printing of the upper structure of the implant prosthesis to replace a traditional cutting process, environmental pollution is avoided, material loss is reduced, manufacturing precision is improved, and product quality is improved.

A knee joint prosthesis structure comprises a thighbone component, a cushion block component, a tibia component and a patella component, the thighbone component is provided with an intercondylar fixing block, the intercondylar fixing block is provided with a protruding part, the inner wall of the thighbone component is provided with a first coating used for bone ingrowth or bone growth, the cushion block component is located between the thighbone component and the tibia component, the outer wall of the lower end of the tibia component is provided with a second coating used for bone growth or bone length, the patella component is located in front of the thighbone component, and the inner wall of the patella component is provided with a third coating used for bone growth or bone length. The knee joint prosthesis structure is a biological type fixed prosthesis structure, various defects and complications caused by bone cement fixation can be avoided, harm to patients and surgical related medical staff due to current bone cement application is reduced, the long-term stability of the prosthesis is improved, the prosthesis loosening rate and the surgical revision rate are reduced, the cost is saved, and the cost is reduced. and the problem of precious medical observation is solved, and great social effect and economic benefit are achieved.

An intraoral insertion path visualizer is applied in the field of oral fixed prosthesis, especially in fixed prosthodontics requiring that abutments share the same insertion path. The intraoral insertion path visualizer mainly comprises two parallel visualizing rulers, a crossbeam and a handle. One of the visualizing rulers is disposed at an end of the crossbeam and is rotatable, and the other visualizing ruler is disposed at the other end of the crossbeam and can slides in a sliding groove in the crossbeam. The handle is flat so that the handle is convenient to grasp. The intraoral insertion path visualizer is characterized in that: during a visualizing process, the sharp end of one of the visualizing rulers is disposed at the shoulder of an abutment and the sharp end of the other visualizing ruler is disposed at the shoulder of another abutment, and therefore the same insertion path of the abutments can be visualized. One of the visualizing rulers is fixed relatively and the other visualizing ruler can be adjusted by allowing the visualizing ruler to slide along the crossbeam according to the different distances between the two abutments. The two visualizing rulers are both rotatable so as to suit each axial surface of the abutments.

The invention provides a preparation method of a tumor bone cutting edge filler for preventing prosthesis loosening and tumor postoperative recurrence. The preparation method comprises the following production steps of: (1) preparing metal particles containing magnesium elements, and carrying out cleaning; (2) respectively weighing the mass of the bone cement powder and the mass of the metal particles at a ratio; (3) loading the mixed powder weighed in the step (2) into a packaging bag for carrying out independent vacuum packaging and disinfection; (4) during utilization, adding the mixed powder and the bone cement liquid into a sterile vacuum mixing bowl; (5) preventing the magnesium particles from being oxidized in air, and mixing the mixed reagent in the step (4) in a vacuum stirrer; and (6) when stirring is carried out for certain time, implanting the mixture of the bone cement and the magnesium particles into the medullary cavity, waiting for solidification, and fixing the prosthesis. By use of the tumor bone edge cutting filler, the risk of secondary surgery is reduced, the postoperative living quality of a patient is greatly improved, manpower and material resources are saved, and the tumor bone edge cutting filler is suitable for being popularized and used.

The fabrication of an implant-supported fixed complete denture involves multiple clinical and laboratory steps. One of the main steps is to provide the patient with an interim fixed prosthesis to evaluate the patient's esthetic and function al needs as well as to enhance the patient's psychology before proceeding to the definitive prosthesis. Different techniques for fabricating interim prostheses have been described in the literature. This disclosure describes a method of fabricating an implant-supported fixed interim prosthesis using self-curing acrylic resin. The interim prosthesis may be used as a blueprint for the definitive implant-supported hybrid prosthesis.

The invention relates to a tooth fixed prosthesis, in particular to a fixed prosthesis for partially missing teeth. The fixed prosthesis includes a bracket and a prosthesis body, the bracket includesa first bracket and a second bracket, the first bracket is a positive bracket, and includes a first connection body, a first wing plate, an adjacent tooth near-the-center support and a precise attachment positive bolt; the second bracket is a negative bracket, and includes a second connection body, a second swing plate, an adjacent tooth far-from-the-center support and a precise attachment negative channel. According to the fixed prosthesis for the partially missing teeth, reversed recesses formed by adjacent teeth at both ends and the adjacent teeth are fully used for enhancing retention force of products, operations are not needed, prepared adjacent tooth tissue is little, the adjacent teeth and tooth tissue are not damaged, and the health of the adjacent teeth is protected.

The invention discloses an acetabulum prosthesis extractor for revision. The acetabulum prosthesis extractor comprises an acetabulum prosthesis supporting outer rod, a movably connected rotating rod is arranged on the outer side of the acetabulum prosthesis supporting outer rod; a movably connected acetabulum prosthesis supporting inner rod is arranged in the acetabulum prosthesis supporting outerrod in a sleeving manner; a fixedly connected third buffer layer is arranged at one end of the acetabulum prosthesis supporting outer rod, a first baffle plate and a second baffle plate which are fixedly connected are arranged in the acetabulum prosthesis supporting outer rod, a fixedly connected pressing handle is arranged at one end of the acetabulum prosthesis supporting inner rod, and the pressing handle and the acetabulum prosthesis supporting inner rod are of an integrated structure. The extractor has the beneficial effects that through a first spring and a second spring in a first bonetest head and a second bone test head, the spherical size can be changed according to bones of different sizes, the effectiveness of an operation is improved, and the progress of the operation is accelerated; due to the arrangement of the suction cups, the tightness of the fixing prosthesis is greatly improved.

The invention discloses a connecting prosthesis for bone defects and relates to the medical field. The connecting prosthesis comprises a fixed prosthesis body and an adjusting prosthesis body, wherein a connecting component is arranged at one end of the fixed prosthesis body, and a first medullary canal stem is arranged at the other end and is integrally formed with the fixed prosthesis body; a blind hole is formed in the connecting part, a first locating hole is formed in the blind hole, and a first locking screw is arranged at the first locating hole; one end of the adjusting prosthesis body is arranged in the blind hole and detachably connected with the blind hole through the first locking screw, and a second medullary canal stem is arranged at the other end of the adjusting prosthesis body and integrally formed with the adjusting prosthesis body; an adjuster is arranged on the adjusting prosthesis body and can slide on the adjusting prosthesis body, a second locating hole is formed in the adjuster, a second locking screw is arranged at the second locating hole, and the adjuster is detachably connected with the adjusting prosthesis body through the second locking screw. With the adoption of the design, the connecting prosthesis can be adjusted properly according to actual conditions and is enabled to have better mechanical performance and support effect after mounted, and the function can be restored early.

The invention relates to a process for preparing cements used for reparative or reconstructive bone surgery, in particular for fixing prostheses, for bone repair and for vertebroplasty, and obtained from liquid single-phase formulations. It also relates to the cements prepared from these single-phase formulations and to a device for injecting them.